<!DOCTYPE html>
<html xmlns="http://www.w3.org/1999/xhtml" xmlns:epub="http://www.idpf.org/2007/ops" lang="en">
    <head>
        <title>MathML invalid 001</title>
        <meta charset="UTF-8" />
    </head>
    <body>
        <h1>nested math tags should be invalid even inside epub switch</h1>
        <epub:switch>
            <epub:case required-namespace="http://www.w3.org/1998/Math/MathML">
                <math alttext="placeholder" display="block" overflow="scroll"
                    xmlns="http://www.w3.org/1998/Math/MathML">
                    <math alttext="a">
                        <mn>11</mn>
                        <mo>,</mo>
                        <mo>−</mo>
                        <mn>3</mn>
                        <mo>,</mo>
                        <mn>5</mn>
                    </math>
                </math>
            </epub:case>
            <epub:default>
                <img src="../Images/Image0001.svg" alt="" /></epub:default>
        </epub:switch>
    </body>
</html>
